Teledyne API Ultrafine Particle Monitor - Model 651APPENDIX A Firmware Commands

RRD – Read Data Record

RRD returns the current data values in the “D” record format. Data records are collected according to the time period you have specified for the data collection interval.

 

 

 

RRD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Command

 

RRD

 

 

 

 

 

 

 

 

 

 

Response

 

D record (see below)

 

 

 

 

 

 

 

 

 

 

 

 

D

 

Record identifier

 

 

 

 

 

 

 

 

 

 

Date

 

Date in yyyy/mm/dd format

 

 

 

 

 

 

 

 

 

Time

 

Time in hh:mm:ss format

 

 

 

 

 

 

 

 

 

 

Flags

 

Status Flags (see information in RIE command

 

 

 

 

 

 

 

 

 

description)

 

 

 

 

 

 

 

 

 

 

 

Conc

 

Aggregated concentration calculated by dividing

 

 

 

 

 

 

 

 

 

the accumulated aggregate counts by the live-

 

 

 

 

 

 

 

 

 

time of the sample flow rate (2 cm3/sec). The

 

 

 

 

 

 

 

 

 

aggregated counts and live-times are

 

 

 

 

 

 

 

 

 

 

accumulated each 1/10th second interval. The

 

 

 

 

 

 

 

 

 

overflow flag is set when the concentration value

 

 

 

 

 

 

 

 

 

exceeds the maximum specified concentration.

 

 

 

 

 

 

 

AT

 

Elapsed sample time 0.1 sec resolution (0.1 to

 

 

 

 

 

 

 

 

3600)

 

 

 

 

 

 

 

 

 

 

 

 

LT

 

Live time 0.001 sec resolution (0.001 to 3600)

 

 

 

 

 

 

 

CNT

 

Accumulated particle counts

 

 

 

 

 

 

 

 

 

Photo

 

Average photodetector value in mV

 

 

 

 

 

 

 

Reserved

 

Blank reserved space

 

 

 

 

 

 

 

 

 

 

PH

 

Average pulse height in mV

 

 

 

 

 

 

 

 

 

PSTD

 

Pulse height standard deviation

 

 

 

 

 

Example D Record:

 

 

 

 

 

 

 

 

 

 

D,2012/11/2,08:01:21,0,1.04e4,6.0,4.4,769424,140,,0,0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Record Type

Date

 

Time

Flags

 

Conc

 

AT

LT

CNT

Photo

PH

PSTD

D

2012/11/2

 

08:01:21

0

 

 

1.04e4

 

6.0

4.4

769424

140

0

0

07506C DCN6727

A-9

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Teledyne 651 operation manual RRD Read Data Record, Rrd